Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography

This study is ongoing, but not recruiting participants.
Ludwig Boltzmann Gesellschaft
Information provided by (Responsible Party):
Medical University of Graz Identifier:
First received: April 13, 2012
Last updated: September 15, 2014
Last verified: September 2014

The aim of the study is to determine relevant hemodynamic parameters for the diagnostics of pulmonary arterial hypertension (PAH) by dynamic contrast enhanced dual-energy CT (DE-CT). In this pilot study the investigators investigate patients who underwent right heart catheterisation with DE-CT to determine hemodynamic parameters and control the results by other clinical investigations. The investigators expect that using this non-invasive method, parameters relevant for the diagnosis of the patients with PAH, like pulmonary blood volume, blood flow and perfusion heterogeneity, can be determined.

Condition Intervention
Pulmonary Arterial Hypertension
Radiation: Dual-energy computed tomography investigation

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Diagnostic
Official Title: Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography - Pilot Study

Resource links provided by NLM:

Further study details as provided by Medical University of Graz:

Primary Outcome Measures:
  • Pulmonary blood flow and volume determined by dual energy computed tomography [ Time Frame: measurements with right heart catheterisation within 1 month ] [ Designated as safety issue: No ]
    determination of differences in pulmonary blood flow and volume of pulmonary hypertension patients

Secondary Outcome Measures:
  • Comparison of dual energy computed tomography derived data with clinical findings of pulmonary hypertension patients [ Time Frame: measurements with right heart catheterisation within 1 month ] [ Designated as safety issue: No ]
    comparison of different state or type of pulmonary hypertension

  • Lung perfusion heterogeneity determined by dual energy computed tomography [ Time Frame: measurements with right heart catheterisation within 1 month ] [ Designated as safety issue: No ]
    quantification of regional perfusion differences in pulmonary hypertension patients

Estimated Enrollment: 25
Study Start Date: June 2011
Estimated Study Completion Date: May 2017
Estimated Primary Completion Date: May 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
pulmonary vascular disease
Dual-energy computed tomography investigation
Radiation: Dual-energy computed tomography investigation

1x 20ml Ultravist (370mg J/ml)3-5ml/s,

1x 70ml Ultravist (370mg J/ml)3-5ml/s Contrast agent administration

Other Name: CT

Detailed Description:

Pulmonary arterial hypertension (PAH) is a rare, life-threatening disease. It is characterized by the elevation of pulmonary arterial pressure and pulmonary vascular resistance. A remodeling of small pulmonary vessels characterized by the proliferation of the adventitia, the hypertrophy of the media and fibrosis of the intima can be observed on the microscopic level.

Non-invasive techniques for hemodynamic assessment and identification of early pulmonary vascular remodeling and pulmonary hypertension have a marked practical advantage as compared to invasive right heart catheterization, however, their accuracy and reliability is not well established.

In the present study the investigators examine patients who underwent right heart catheterization and are scheduled for a thorax CT with an additional dynamic contrast-enhanced DE-CT protocol and derive established parameters for the diagnosis of PAH as well as novel parameters from the CT scans. These are compared to results from the right-heart catheterization and other investigations routinely carried out on these patients.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patients with right heart catheterization data

Exclusion Criteria:

  • patients with decreased renal function
  • patients who received CT in the previous six months
  • intolerance of contrast material
  • other standard CT contraindications
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Please refer to this study by its identifier: NCT01607489

Medical University Graz, Division of Pulmonology
Graz, Steiermark, Austria, 8010
Sponsors and Collaborators
Medical University of Graz
Ludwig Boltzmann Gesellschaft
Principal Investigator: Horst Olschewski, MD Medical University of Graz
  More Information

No publications provided by Medical University of Graz

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Medical University of Graz Identifier: NCT01607489     History of Changes
Other Study ID Numbers: 23-356 ex 10/11
Study First Received: April 13, 2012
Last Updated: September 15, 2014
Health Authority: Austria: Federal Office for Safety in Health Care

Keywords provided by Medical University of Graz:
Early diagnosis of pulmonary arterial hypertension
dynamic dual-energy computed tomography

Additional relevant MeSH terms:
Hypertension, Pulmonary
Cardiovascular Diseases
Lung Diseases
Respiratory Tract Diseases
Vascular Diseases processed this record on March 26, 2015